Thomson Licensing

Thomson Licensing Dtv

Interdigital Vc Holdings, Inc.

Dolby Laboratories Licensing Corporation

Thomson Licensing S.a.

Interdigital Madison Patent Holdings

Cristina Gomila

Peng Yin

Joan Llach

Jeffrey Allen Cooper

Yeping Su

Jill MacDonald Boyce

Xiaoan Lu

Joel Sole

Yunfei Zheng

Qian Xu

Purvin Bibhas Pandit

Jae Hoon Kim

Gokce Dane

Jill Macdonald Boyce

Alexandros Michael Tourapis

Yali Liu

Oscar Divorra Escoda

Alexander Kobilansky

Wuttipong Kumwilaisak

Jiancong Luo

Lihua Zhu

Po-Lin Lai

Shay Har-Noy

Joan Lllach

Jill Mac Boyce

Film grain simulation within a receiver () occurs by first obtaining at least one block of pre-computed transformed coefficients. The block of pre-computed transformed coefficients undergoes filtering responsive to a frequency range that characterizes a desired pattern of the film grain. In practice, the frequency range lies within a set of cut frequencies f, f, fand fof a filter in two dimensions that characterizes a desired film grain pattern. Thereafter, the filtered set of coefficients undergoes an inverse transform to yield the film grain pattern.

Film grain simulation based on pre-computed transform coefficients

At least one disclosed method and apparatus relate to inter-view prediction with different resolution reference picture. A particular method includes accessing at least a portion of an encoded picture (), the encoded picture being from a particular view of multiple views, and the portion being encoded at a particular resolution. The method further includes determining a particular view level based on the particular view (), determining the particular resolution based on the particular view level (), and decoding the portion based on the particular resolution ().

Inter-view prediction

There are provided methods and apparatus for multi-view video coding. A video encoder includes an encoder for encoding a block in a picture by choosing between temporal prediction and cross-view prediction to enable a prediction for the block. The picture is one of a set of pictures corresponding to multi-view video content and having different view points with respect to a same or similar scene. The picture represents one of the different view points. A high-level syntax is used to indicate the use of cross-view prediction for the block.

Methods and apparatuses for multi-view video coding

There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block.

Methods and apparatus for transform selection in video encoding and decoding

Methods and apparatus are provided for rate control accuracy in video encoding and decoding. An apparatus includes a video encoder for encoding image data using rate control. The rate control involves estimating a quantization step size and adjusting a rounding offset. The rounding offset is capable of being non-constant during the encoding.

Method and apparatus for rate control accuracy in video encoding and decoding

The present invention provides apparatuses and systems for determining block averages in film grain simulation including determining block averages during a display process and determining block averages during a decoding process. The apparatuses and systems of the present invention exhibit different characteristics in terms of memory requirements and computational cost. More specifically, the first apparatus and system use no external memory, but require either extra reads of the blocks, or internal memory in the display pipeline, while the second apparatus and system require extra memory bandwidth and extra external memory (e.g., RAM).

Apparatus and system for determining block averages for film grain simulation

There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder for encoding a picture by enabling color compensation of at least one color component in a prediction of the picture based upon a correlation factor relating to color data between the picture and another picture. The picture and the other picture have different view points and both corresponding to multi-view content for a same or similar scene.

Methods and apparatus for illumination and color compensation for multi-view video coding

There is disclosed and described a decoder and decoding method for decoding at least one picture corresponding to at least one of at least two views of multi-view video content from a bitstream, wherein in the bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. Furthermore, there is disclosed and described an encoder and encoding method for encoding at least one picture corresponding to at least one of at least two views of multi-view video content to form a resultant bitstream, wherein in the resultant bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds.

Method and apparatus for decoupling frame number and/or picture order count (POC) for multi-view video encoding and decoding

There are provided a video encoder, a video decoder, and corresponding encoding and decoding methods for providing adaptation of deblocking filtering for multi-view video coding. The video encoder includes a deblocking filter adaptable based on prediction information for encoding multi-view video sequences.

Method and apparatus for providing reduced resolution update mode for multi-view video coding

A system and method for correcting artifacts present in video frames is disclosed. The system includes a decision module () and an artifact correction unit (). The system receives artifact metrics () and artifact maps () corresponding to artifacts present in video frames and prioritizes the video frames to be corrected by considering the type and severity of the artifacts and the content of the video frames (). Subsequent to prioritizing the video frames, the system corrects artifacts of selected frames by adjusting compressed domain parameters (), such as quantization parameters and mode decisions. An encoder () compresses the video frames according to the adjusted compressed domain parameter to automatically provide a video stream with a lower incidence and severity of artifacts.

Method and apparatus for automatic visual artifact analysis and artifact reduction

Methods and apparatus for multi-view video coding

A method and apparatus are provided for rate control accuracy in video encoding. The apparatus includes a video encoder for encoding image data in a single encoding pass using rate control. The rate control involves defining a quantization step size value and a rounding offset value and refining at least the rounding offset value. The image data is encoded responsive to the quantization step size value and the refined rounding offset value.

Method and apparatus for rate control accuracy in video encoding

Methods and apparatus are provided for video coding and decoding with reduced bit-depth update mode and reduced chroma sampling update mode. An apparatus includes an encoder for encoding at least a portion of a picture using at least one of a reduced bit-depth update mode and a reduced chroma sampling update mode that respectively reduces at least one of a bit-depth and a chroma sampling of a residue signal corresponding to the portion.

Growing community of inventors

Princeton, NJ, United States of America

Cristina Gomila